[My original response to the list got bounced because it included zip files. I am posting again without the attachments.]
I attached the results (_b is with BROKEN = 0). I didn't notice any problems in the Vera test, but in cmmi, Delta has problems when BROKEN is 1, it looks better when BROKEN is 0. I think the problem is related to autohinting. When I compile freetype, the patented bytecode and subpixel hinting support is disabled, I am using freetype's autohinting instead. I recompiled freetype with the support for the patented hinting instead of autohinting, and reran the test on cmmi.ttf. The result is cmmi10_p.txt. Darren On Monday 29 October 2007 08:57:42 am Michael Droettboom wrote: > I should also mention -- please let me know if setting BROKEN to 0 fixes > any rendering problems. > > Cheers, > Mike > > Michael Droettboom wrote: > > Forgot to attach the program. > > > > Michael Droettboom wrote: > >> Nicolas, Darren, > >> > >> I have created a minimal program that hopefully will exercise the > >> problem. If it breaks for either of you, I'll take this to the > >> freetype mailing list for further clarification... If it doesn't > >> break for you, my theory about the cause is still incorrect. > >> > >> I have attached a small C program. You can build it as follows, > >> assuming freetype is installed in the usual place: > >> > >> gcc -I/usr/include/freetype2 -lfreetype test_hinting_stretch.c -o > >> test_hinting_stretch > >> > >> Then you can run it by providing a .ttf fontname on the path. The one > >> that seems to trip up so far is > >> lib/matplotlib/mpl-data/fonts/ttf/cmmi10.ttf (in the matplotlib source > >> tree), but I'm curious to know if it also breaks for other more > >> popular fonts like vera.ttf. > >> > >> ./test_hinting_stretch path_to_font > >> > >> It will render and print out all the glyphs in the font on stdout. > >> Please send me the output (offlist, since it will be quite long). > >> > >> Thanks for helping me solve this problem, > >> Mike > >> > >> [EMAIL PROTECTED] wrote: > >>> I tried to change the value and the highest one I can use is 2 so > >>> it's not a big improvement for what I understand. > >>> > >>> You can contact me if you need other test naturally > >>> > >>> N. > >>> > >>> Le Friday 26 October 2007 12:24:34 Michael Droettboom, vous avez écrit : > >>>> It's great to have narrowed this down! Unfortunately, with that > >>>> #define > >>>> removed, you will get lower quality fonts (the hinting will be more > >>>> extreme, which causes the glyphs to often look too thin, or > >>>> inconsistent.) See this thread for more information -- > >>>> > >>>> http://www.mail-archive.com/[EMAIL PROTECTED]/msg > >>>>01480 > >>>> > >>>> .html > >>>> > >>>> I'd hate to turn off this improvement because it doesn't work in some > >>>> environments. > >>>> > >>>> I wonder if you wouldn't mind performing one more experiment... There > >>>> is another define at the top of ft2font.cpp, "HORIZ_HINTING" that > >>>> controls the amount of hinting subsampling. Currently it is set to 8, > >>>> but I wonder if a lower value would work. Ideally, we want to set > >>>> this as high as we can get away with. > >>>> > >>>> #define VERTICAL_HINTING > >>>> #ifdef VERTICAL_HINTING > >>>> #define HORIZ_HINTING 8 > >>>> #else > >>>> #define HORIZ_HINTING 1 > >>>> #endif > >>>> > >>>> Would you mind trying other values and seeing if any work? If not, > >>>> I'll > >>>> probably take this question to the freetype mailing list now that > >>>> we've narrowed the cause down to only a three line difference in the > >>>> code. > >>>> > >>>> Cheers, > >>>> Mike > >>>> > >>>> [EMAIL PROTECTED] wrote: > >>>>> Le Friday 26 October 2007 11:22:06, vous avez écrit : > >>>>>> Thanks for this information. It looks like the font outline data is > >>>>>> somehow getting corrupted before freetype renders it. Again, > >>>>>> however, I > >>>>>> can't reproduce it on my machine (I've attached a copy of what it > >>>>>> looks > >>>>>> like for me), so I'm still pretty stumped. My suspicion is that > >>>>>> it's a > >>>>>> 64-bit vs. 32-bit problem since both people known to have trouble > >>>>>> are on > >>>>>> 64-bit platforms, and I am not. I have tried recompiling with > >>>>>> gcc-4.2.2 > >>>>>> and I still wasn't able to reproduce. > >>>>> > >>>>> I can imagine that it's difficult for you to debug something you > >>>>> cannot > >>>>> reproduce. Just a remark I don't have 64-bits but a 32 so the > >>>>> problem is > >>>>> not comming because of the plateforme. > >>>>> > >>>>>> One thing you could *try*, to rule out any recent changes to the > >>>>>> glyph > >>>>>> rendering, is to comment out this line near the top of > >>>>>> src/ft2font.cpp: > >>>>>> > >>>>>> #define VERTICAL_HINTING > >>>>>> > >>>>>> as follows > >>>>>> > >>>>>> //#define VERTICAL_HINTING > >>>>> > >>>>> Yes it's doing the trick., I don't have anymore the problem. Thank > >>>>> you very much. I have now the same result than you with the test I > >>>>> produce before. > >>>>> > >>>>>> Additional information: Are there any warnings produced when > >>>>>> compiling > >>>>>> ft2font.cpp? Can you send me your matplotlibrc file? > >>>>> > >>>>> just the classic one: > >>>>> > >>>>> cc1plus: warning: command line option "-Wstrict-prototypes" is > >>>>> valid for > >>>>> Ada/C/ObjC but not for C++ > >>>>> > >>>>> Thank you very much. > >>>>> > >>>>> N. > >>>>> > >>>>>> Cheers, > >>>>>> Mike > >>>>>> > >>>>>> [EMAIL PROTECTED] wrote: > >>>>>>> Yep that can be a good idea. I don't know anything on how > >>>>>>> mathtext is > >>>>>>> working but I'm not completely sure that the problem is with > >>>>>>> freetype > >>>>>>> because sometime that can work. In reality every character I tested > >>>>>>> worked but you have to put in a certain order. To understand a > >>>>>>> little > >>>>>>> bit more what I try to say (very badly) see the script join and the > >>>>>>> figure. > >>>>>>> > >>>>>>> I hope that can help a little bit to try to find the reason of this > >>>>>>> behaviour. > >>>>>>> > >>>>>>> N > >>>>>>> > >>>>>>> Le Thursday 25 October 2007 15:41:40 Michael Droettboom, vous avez > >>> > >>> écrit : > >>>>>>>> Darren Dale wrote: > >>>>>>>>> Hi Mike, > >>>>>>>>> > >>>>>>>>> On Tuesday 23 October 2007 09:05:56 am Michael Droettboom wrote: > >>>>>>>>>> Unfortunately, I can't reproduce this on my machine even with > >>>>>>>>>> the latest stable version of freetype-2.5.3 (which is the same > >>>>>>>>>> version > >>>>>>>>>> in Ubuntu Gutsy). > >>>>>>>>> > >>>>>>>>> I think you mean freetype-2.3.5. I also have that version > >>>>>>>>> installed, > >>>>>>>>> although the mpl setup script is reporting 9.16.3. > >>>>>>>> > >>>>>>>> Yes. freetype-2.3.5. There are arcane historical reasons I don't > >>>>>>>> fully comprehend why the pkgconfig version doesn't match the > >>>>>>>> release > >>>>>>>> version (and why freetype2 is called freetype6 on Debian and > >>>>>>>> derivatives)... but my numbers do match yours. > >>>>>>>> > >>>>>>>>>> The Ubuntu/Debian package of freetype has a lot of patches > >>>>>>>>>> applied, and I don't know if they are causing this (but from the > >>>>>>>>>> looks of them, I doubt it). > >>>>>>>>>> > >>>>>>>>>> Can you set debug.verbose to "annoying" and send me the output > >>>>>>>>>> of your matplotlib run? I want to rule out any font-loading > >>>>>>>>>> problems. > >>>>>>>>> > >>>>>>>>> It's attached. I'm running 64bit gentoo, everything compiled with > >>>>>>>>> gcc-4.2.2, in case its relevent. > >>>>>>>> > >>>>>>>> Always good to have more details, but I'm sort of at a loss on > >>>>>>>> this one, especially since I can't reproduce it. > >>>>>>>> > >>>>>>>> Maybe we need to take a poll on this list of who is working and > >>>>>>>> who isn't to see what the source of the breakage may be... > >>>>>>>> > >>>>>>>> Cheers, > >>>>>>>> Mike > >>>>>>>> > >>>>>>>> ------------------------------------------------------------------ > >>>>>>>>---- > >>>>>>>> > >>>>>>>> -- > > > > ------------------------------------------------------------------------ > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by: Splunk Inc. > > Still grepping through log files to find problems? Stop. > > Now Search log events and configuration files using AJAX and a browser. > > Download your FREE copy of Splunk now >> http://get.splunk.com/ > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Matplotlib-users mailing list > > Matplotlib-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Darren S. Dale, Ph.D. Staff Scientist Cornell High Energy Synchrotron Source Cornell University 275 Wilson Lab Rt. 366 & Pine Tree Road Ithaca, NY 14853 [EMAIL PROTECTED] office: (607) 255-3819 fax: (607) 255-9001 http://www.chess.cornell.edu ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. 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